<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>蓝色斜体文字</title>
</head>
<body>
    <b>
        <i>
       <font color="blue">
           这是蓝色文字
       </font>
        </i>
    </b>
</body>
</html>